Arduino Low Power - How To Run ATmega328P For a Year On Coin Cell Battery

An Arduino Uno runs less than one day on a 9 V battery because it uses about 45 mA current. Using an Arduino Pro Mini, with a simple modification, the power consumption goes down to 54 μA (0.054 mA) with the 3.3 V version or 23 μA (0.023 mA) with the 5 V version, in power-down sleep. That is 4 years on a 9 V battery with 1,200 mAh capacity or 2,000 times more efficient
- Arduino Low Power - How To Run ATmega328P For a Year On Coin Cell Battery

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The 1 Million Lumen Lamp

A single 1 Million Lumen High Intensity Discharge Lamp gives more light than 1 000 conventional filament bulbs. While there is currently a period of fast advancement in LED lights, older technologies as High Intensity Discharge Lamps (HID) (also called High-Pressure Discharge), and Fluorescent Lamps/Tubes (also called Low Intensity Discharge) are taking big steps forward. What is a 1 Million Lumen Light used for? It is intended to light up indoor and outdoor TV sets. For example, if you
- The 1 Million Lumen Lamp

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LED Dimmer for 220-240V Lamps HowTo

This article is primary for those in a country with a 220-240V~50Hz electrical system. Do you know how it is when you sit in a room, somebody comes in, turns the light on and it becomes way too bright? If you turn off the light again, then the other person won't be satisfied. So why not agree on a level between no light and full brightness? This article explains how to dim 200-240 Volt Dimmable LED light bulbs. Two
- LED Dimmer for 220-240V Lamps HowTo

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What you Need to Know when Buying and Using RGBW LEDs

More and more stores and restaurants begin to use colorful light inside and outside. There are so many possibilities with color LED lighting that companies contract more and more illuminating consultants. Multi-color LED light bulbs have become so cheap that they can replace all existing lights at home. With RGBW LEDs you get the same white as with traditional LED lights, you can dim your light and you have many colors to create a mood. Can you control an RGBW
- What you Need to Know when Buying and Using RGBW LEDs

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How Bluetooth Smart / Bluetooth Low Energy (BLE) replaces Keys, Credit Cards and adds Indoor GPS

With Bluetooth Smart (or Bluetooth Low Energy / Bluetooth LE / BLE / Bluetooth 4.0), there suddenly appear all kinds of possibilities. Like opening a lock only by coming close to it with your mobile phone in your pocket; attaching BLE Tag/Tracker/Sticker/Beacon to things and pets and locating them with your phone or letting the sticker ring; indoor GPS navigation with iBeacon Tags; tracking customer behavior, or hands-free payment with PayPal Beacon. This article will explain how these innovations
- How Bluetooth Smart / Bluetooth Low Energy (BLE) replaces Keys, Credit Cards and adds Indoor GPS

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Send Push Notifications and Any File with Telegram Messenger on the Raspberry Pi

With the telegram-cli command-line client, you can send text, picture or video messages as push notifications from any application, send end-to-end encrypted messages that can destruct themselves, build a bot that executes tasks based on the message you send it, ... This article covers How Telegram Messenger is different from WhatsApp How to install and configure telegram-cli on the Raspberry Pi Examples how to use telegram-cli How to send push notifications, pictures, videos or files from the RaspberryPi to your mobile
- Send Push Notifications and Any File with Telegram Messenger on the Raspberry Pi

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Temperature and Humidity from AM2302/DHT22 Sensor Displayed as Chart

In this how-to, the Raspberry Pi will be configured to automatically acquire and log temperature and humidity from a AM2302/DHT22/DHT11 sensor and display the collected data like in the following picture. About the AM2302/DHT22 Temperature and Humidity Sensor The AM2302 and DHT22 sensors share the same characteristics. From my perspective these sensors are the same. The DHT11 on the other hand is a little cheaper but only intended for indoor use. On e-Bay you can find a
- Temperature and Humidity from AM2302/DHT22 Sensor Displayed as Chart

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Installing Google Drive On Raspberry Pi

Google gives you 15 GB of space for Google Drive, Gmail, and Google+ Photos, completely free. Further you can browse and open your files on Windows, MAC, Android, iPhone/iPad, on Windwows Phone and the Web Interface (see Official Page). For Linux, there is no support from Google, but there is an Open Source program called Grive. Here I will describe how to Setup Grive on the Raspberry Pi and how to set up a Filesystem Watcher that will sync
- Installing Google Drive On Raspberry Pi

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